Question

fórmula de baskara

a) 7x²+3x=2x²+7
socorro

Answer 1

Oi 

a)

7x²+ 3x =2x² + 7
7x²-2x² +3x -7=0
5x²+3x-7=0
a=5
b=3
c=-7

Δ=b²-4.a.c
Δ=(3)²-4.5.(-7)
Δ=9 + 140
Δ=149

x= $\frac{-b+- \sqrt{delta} }{2.a}$
x'=$\frac{-(3)+ \sqrt{149} }{10}$


x"=$\frac{-(+3)- \sqrt{149} }{10}$
x"=$\frac{-3- \sqrt{149} }{10}$

s( x'=$\frac{-3+ \sqrt{149} }{10}$,x"=$\frac{-3- \sqrt{149} }{10}$)

Bons estudos!!!